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Comment by jasonshen | Hacker News Reader

Noob question: I just installed the newest version of rails with "gem install rails" but when I run "rails -v" I stil get 3.2.11

How do tell the computer to start using the newest version of Rails?

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'bundle update rails' should do it subject to your Gemfile specifying a particular version.

Updated the Gemfile and ran this command. Worked. Thanks!

Change your Gemfile so it says "gem 'rails', '~> 3.2.12'"

Ah that's it. I'm going through mhartl's Ruby on Rails Tutorial and he has us specify a Rails version to maintain consistency btw the tutorial and our code.

Thanks!

I use exact gem versions because experience shows that even minor gem updates can break the tutorial. (RSpec is particularly guilty of this.) I generally recommend '~>' for more advanced users, but when getting your bearings I think it's best to use exact versions.

That said, I keep the Rails Tutorial and sample application as up-to-date as possible—and in fact both have already been updated with the latest version. :-)

http://ruby.railstutorial.org/ruby-on-rails-tutorial-book#se...

    $ gem install rails -v 3.2.12

https://github.com/railstutorial/sample_app_2nd_ed/blob/mast...

    gem 'rails', '3.2.12'

Great to see you here Michael. I guess the gap between when I started the Tutorial and when you updated it accounts for the difference. Currently on Chapter 7!

Have you tried uninstalling the earlier versions before downloading the new one?

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